Abstract: A method of forming compounds that comprise a heterocyclic carbene ligand is provided. In particular, an oxazole or a thioazole carbene are used in place of the traditional imidazole carbene. These compounds may be used in OLEDs to provide devices having improved properties, such as stability and color-tuning.

Abstract: Novel phosphorescent tetradentate platinum (II) compounds comprising a twisted aryl group are provided. Also provided are novel phosphorescent tetradentate platinum (II) compounds comprising an imidazo[1,2-f]phenanthridine moiety. The compounds may be used in organic light emitting devices to provide improved device efficiency, line shape and lifetime.

Abstract: Novel phosphorescent heteroleptic iridium complexes with phenylpyridine and dibenzo-containing ligands are provided. Alkyl substitution at specific positions on the ligands gives rise to compounds with improved OLED properties, including saturated green emission.

Abstract: The present disclosure relates to novel iridium complexes that can be used in organic light emitting devices (OLEDs). The present disclosure also relates to devices and formulations that incorporate the iridium complexes.

Abstract: Novel phosphorescent heteroleptic iridium complexes with phenylpyridine and dibenzo-containing ligands are provided. Alkyl substitution at specific positions on the ligands gives rise to compounds with improved OLED properties, including saturated green emission.

Abstract: A composition comprising a first compound and a second compound is described. The composition can be a mixture of a first compound having a structure according to Formula I, and a second compound having a structure according to Formula II, The composition can also be a mixture of a first compound having a structure according to Formula III, and a second compound having a structure according to Formula IV, Devices, such as OLEDs, that include the compositions for Formulas I & II or Formulas III & IV, as well as, methods of making the same are also described.

Abstract: Novel ligands for metal complexes, where the ligands contain fused carbo or heterocycles on the quinoline building block are disclosed. More extended aromaticity within the molecule allows red shift when the molecules are used as light emitting dopants in organic light emitting diodes/devices.

Abstract: A compound comprising a ligand LA of Formula I: as well as, devices and formulations containing the compound of Formula 1 are disclosed. In the compounds, having a ligand La of Formula I: wherein R1 represents mono, or di-substitution, or no substitution; wherein R2 represents di, tri, or tetra-substitution; wherein R is selected from hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof; wherein R1 and R2 are each independently selected from hydrogen, deuterium, alkyl, cycloalkyl, aryl, and combinations thereof; wherein at least one pair of adjacent R2 substitutions are joined to form a fused ring; wherein the ligand LA is coordinated to a metal M; and wherein the ligand LA is optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate or hexadentate ligand.

Abstract: Novel organic compounds containing triphenylene and triazine moieties are described. These compounds are expected to improve device performance when they are used in organic electroluminescent devices.

Abstract: An organic light emitting device that includes an anode, a cathode, and an emissive layer that includes an organic compound selected from and at least one emissive dopant. The emissive dopant can be one of a variety of organometallic iridium complexes.

Abstract: Novel phosphorescent tetradentate platinum (II) compounds comprising a twisted aryl group are provided. Also provided are novel phosphorescent tetradentate platinum (II) compounds comprising an imidazo[1,2-f]phenanthridine moiety. The compounds may be used in organic light emitting devices to provide improved device efficiency, line shape and lifetime.

Abstract: Phosphorescent materials are provided, where the materials comprise a coordination compound having at least one ligand L3 having Formula (I): wherein A and B are each independently a 5-membered or 6-membered carbocyclic or heterocyclic ring; wherein RA, RB, RC, and RD each represent mono, di, tri, tetra substitutions, or no substitution; wherein Z1, Z2, Z3, Z4, Z5, Z6, Z7, and Z8 are each selected from N or C; wherein at least one of Z1, Z2, Z3, Z4, Z5, Z6, Z7, and Z8 is N; wherein one of Z1, Z2, Z3, and Z4 is C that is bonded to N of A; wherein Z is selected from the group consisting of BR, NR, PR, O, S, Se, C?O, S?O, SO2, CRR?, SiRR?, and GeRR?; wherein R, R?, RA, RB, RC, and RD are described herein; wherein L3 is coordinated to a metal M1; and wherein L3 may be linked with other ligands to comprise a tridentate, tetradentate, pentadentate, or hexadentate ligand. Devices, such as organic light emitting devices, comprising such compounds are also provided.

Abstract: A compound comprising a ligand LA of Formula I: as well as, devices and formulations containing the compound of Formula 1 are disclosed. In the compounds, having a ligand La of Formula I: wherein R1 represents mono, or di-substitution, or no substitution; wherein R2 represents mono, di, tri, or tetra-substitution, or no substitution; wherein R is selected from hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof; wherein R1 and R2 are each independently selected from hydrogen, deuterium, alkyl, cycloalkyl, aryl, and combinations thereof; wherein any adjacent substituents of R2 are optionally joined to form a fused ring; wherein the ligand LA is coordinated to a metal M; and wherein the ligand LA is optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate or hexadentate ligand.

Abstract: Novel phosphorescent tetradentate platinum (II) compounds comprising a twisted aryl group are provided. Also provided are novel phosphorescent tetradentate platinum (II) compounds comprising an imidazo[1,2-f]phenanthridine moiety. The compounds may be used in organic light emitting devices to provide improved device efficiency, line shape and lifetime.

Abstract: Novel host compounds containing indolo[3,2,1-jk]carbazole moiety are disclosed. These compounds are useful in phosphorescent OLEDs and particularly as hosts and/or electron-blocking layer materials.

Abstract: A compound having a formula M(LA)x(LB)y(LC)z where ligand LA is ligand LB is and ligand LC is is disclosed. In the formula, M is a heavy metal, x and y are 1, or 2, and z is 0, 1, or 2, where x+y+z is the oxidation state of metal M. R1, R2, R3, and R4 are independently selected from group consisting of alkyl, cycloalkyl, aryl, and heteroaryl, and at least one of R1, R2, R3, and R4 has at least two C atoms. Rings A, C, and D are each independently a 5 or 6-membered carbocyclic or heterocyclic ring; at least one RB has the following structure and at least one of R6, R7, and R8 is alkyl, cycloalkyl, halide, and combinations thereof. Any adjacent substitutents of RA, RB, RC, and RD are optionally joined to form a ring.

Abstract: A compound having a Pt tetradentate structure of Formula I, is disclosed. In Formula I, rings A, B, and C each independently represent a 5- or 6-membered carbocyclic or heterocyclic ring; L1, L2, and L3 are each independently selected from the group consisting of a direct bond, BR, NR, PR, O, S, Se, C?O, S?O, SO2, SiRR?, GeRR?, alkyl, cycloalkyl, aryl, heteroaryl, and combinations thereof; X1, X2, and X3 are either carbon or nitrogen; X is O, S, or Se; R1, R2, R3, RA, RB, RC, R, and R? are each independently selected from H and a variety of substituents; and any adjacent R1, R2, R3, RA, RB, RC, R, and R? are optionally joined to form a ring. Formulations and devices, such as OLEDs, that include the compound of Formula I are also described.

Abstract: An organic light emitting device that includes an anode, a cathode, and an emissive layer that includes an organic compound selected from and at least one emissive dopant. The emissive dopant can be one of a variety of organometallic iridium complexes.

Abstract: A phenazasiline comprising compound, and devices and formulations including the same are described. The compound includes a ligand L1 including: wherein E1 is N, E2 is Si, and R4 and R5 represent mono, di, tri, tetra substitutions or no substitution; wherein R1, R2, R3, R4, and R5 are each independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof, and any two adjacent R1, R2, R3, R4, and R5, are optionally joined to form a ring, which may be further substituted. In Formula I, L1 is coordinated to metal M, which has an atomic weight higher than 40, provided that the metal M does not form bond with E1 and E2. L1 may be linked with other ligands.

Abstract: A compound having a formula M(LA)x(LB)y(LC)z, where ligand LA is ligand LB is and ligand LC is is disclosed. In the structure of M(LA)x(LB)y(LC)z, M is a metal; x is 1, or 2; y and z are 0, 1, or 2; X1, X2, X3, X4, X5, X6, X7, and X8 are each independently C or N; rings C and D are each independently a 5 or 6-membered carbocyclic or heterocyclic ring; two adjacent RB form a six-member aromatic carbocyclic or heterocyclic ring E fused to ring B and, when ring E is heterocyclic, the only heteroatom is nitrogen; and ring E can be further substituted by RE. Additionally, any adjacent substituents R11, R12, RB, RC, RD, RE, R1, R2, R3, R4, R? and R? are optionally joined to form a ring. Formulations and devices that include the compound of formula M(LA)x(LB)y(LC)z, are also described.